package com.xiaobias.a03;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.PropertyValues;
import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
import org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor;
import org.springframework.stereotype.Component;

@Component
public class MyBeanPostProcessor implements InstantiationAwareBeanPostProcessor, DestructionAwareBeanPostProcessor {

     private static final Logger logger = LoggerFactory.getLogger(MyBeanPostProcessor.class);

    @Override
    public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            logger.debug("<<<<<<<<<<<<<<<<< 销毁之前执行， 如 @ProDestroy");
        }
    }

    @Override
    public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            logger.debug("<<<<<<<<<<<< 实例化之前执行，这里还回的对象会替换掉原本的 bean");
        }
        return null;
    }

    @Override
    public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            logger.debug("<<<<<<<<<<<< 实例化之后执行，这里如果还回 false 会跳过依赖注入阶段");
        }
        return true;
    }

    @Override
    public PropertyValues postProcessProperties(PropertyValues pvs, Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            logger.debug("<<<<<<<<<<<< 依赖注入阶段执行，如 @Autowired、@Value、@Resource");
        }
        return pvs;
    }

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            logger.debug("<<<<<<<<<< 初始化之前执行，这里还回的对象会替换调原本的 bean, 如 @PostConstruct、 @ConfigurationProperties");
        }
        return bean;
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        if (beanName.equals("lifeCycleBean")) {
            logger.debug("<<<<<<<<<< 初始化之后执行，这里还回的对象会替换调原本的 bean, 比如代理增强");
        }
        return bean;
    }
}
